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PowerPoint ® Presentation Chapter 8 Wiring Materials — Raceways and Boxes Raceway Systems • Cable Assemblies • Other Wiring Systems • Boxes, Conduit Bodies and Fittings – Article 314
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PowerPoint® Presentation
Chapter 8Wiring Materials — Raceways and
BoxesRaceway Systems • Cable
Assemblies • Other Wiring Systems • Boxes, Conduit Bodies and Fittings –
Article 314
Chapter 8 — Wiring Materials — Raceways and Boxes
Rigid metal conduit (RMC) is a conduit made of metal.
Chapter 8 — Wiring Materials — Raceways and Boxes
A nipple is a short piece of conduit or tubing that does not exceed 24 in length.
Chapter 8 — Wiring Materials — Raceways and Boxes
Rigid polyvinyl chloride (PVC) conduit is a conduit made of materials other than metal.
Chapter 8 — Wiring Materials — Raceways and Boxes
A total run of PVC shall not exceed 360° of bends.
Chapter 8 — Wiring Materials — Raceways and Boxes
Electrical metallic tubing (EMT) is a lightweight tubular steel raceway without threads on the ends.
Chapter 8 — Wiring Materials — Raceways and Boxes
Flexible metal conduit (FMC) is a raceway of metal strips which are formed into a circular cross-sectional raceway.
Chapter 8 — Wiring Materials — Raceways and Boxes
Liquidtight flexible metal conduit (LFMC) and liquidtight flexible nonmetallic conduit (LFNC) are raceways of circular cross section.
Chapter 8 — Wiring Materials — Raceways and Boxes
A strut-type channel raceway is a surface raceway formed of moisture-resistant and corrosion-resistant metal.
Chapter 8 — Wiring Materials — Raceways and Boxes
A surface raceway is an enclosed channel for conductors which is attached to a surface.
Chapter 8 — Wiring Materials — Raceways and Boxes
A multioutlet assembly is a metal raceway with factory-installed conductors and attachment plug receptacles.
Chapter 8 — Wiring Materials — Raceways and Boxes
Armored cable (AC) is an assembly that contains the conductors within a jacket made of a spiral wrap of steel.
Chapter 8 — Wiring Materials — Raceways and Boxes
Metal-clad (MC) cable is a factory assembly of one or more conductors with or without fiber optic members.
Chapter 8 — Wiring Materials — Raceways and Boxes
Nonmetallic-sheathed (NM) cable is a factory assembly of two or more insulated conductors having an outer sheath of moisture-resistant, flame-retardant, nonmetallic material.
Chapter 8 — Wiring Materials — Raceways and Boxes
Service-entrance (SE) cable is a single or multiconductor assembly with or without an overall covering.
Chapter 8 — Wiring Materials — Raceways and Boxes
A cable tray system (CTS) is an assembly of sections and associated fittings which form a rigid structural system used to support cables and raceways.
Chapter 8 — Wiring Materials — Raceways and Boxes
Cable trays for multiconductor cables are sized according to Table 392.22(A).
Chapter 8 — Wiring Materials — Raceways and Boxes
A wireway is a metallic or nonmetallic trough with a hinged or removable cover designed to house and protect conductors and cables.
Chapter 8 — Wiring Materials — Raceways and Boxes
Wireways are sized according to Chapter 9, Table 5.
Chapter 8 — Wiring Materials — Raceways and Boxes
A busway is a sheet-metal enclosure that contains factory-assembled aluminum or copper busbars which are supported on insulators.
Chapter 8 — Wiring Materials — Raceways and Boxes
Overcurrent protection shall be provided at the point where busways are reduced in ampacity.
Chapter 8 — Wiring Materials — Raceways and Boxes
An auxiliary gutter is any enclosure equipped with a hinged or removable cover that is used to supplement wiring space.
Chapter 8 — Wiring Materials — Raceways and Boxes
A box is a metallic or nonmetallic electrical enclosure used for equipment, devices, and pulling or termination conductors.
Chapter 8 — Wiring Materials — Raceways and Boxes
Pull boxes and junction boxes are points in the electrical system which provide access to the raceways entering and leaving the boxes.
Chapter 8 — Wiring Materials — Raceways and Boxes
Pull and junction boxes are sized for straight or angle pulls.
Chapter 8 — Wiring Materials — Raceways and Boxes
A conduit body is a conduit fitting that provides access to the raceway system through a removable cover at a junction or termination point.
Chapter 8 — Wiring Materials — Raceways and Boxes
Box size is calculated by the number and size of conductors contained within the box.
Chapter 8 — Wiring Materials — Raceways and Boxes
Framing members of suspended ceiling systems are permitted as support for boxes if the framing member is adequately supported and securely fastened to the building structure.
Chapter 8 — Wiring Materials — Raceways and Boxes
Conduits for boxes not over 100 cu in. with threaded hubs shall be supported within 3 where two or more conduits are threaded wrench tight into the box.
